如何将 LocalDate 转换为字符串形式以便打印出输入的日期

Question

   public void displayDVD(DVD dvd) {
       if (dvd != null) {
           io.print(dvd.getTitle());
           io.print(dvd.getReleaseDate());
           io.print(dvd.getMpaaRating());
           io.print(dvd.getDirectorsName());
           io.print(dvd.getStudio());
           io.print(dvd.getUserRating());

我需要显示 getReleaseDate，但它告诉我不能，因为它是 LocalDate，不能是字符串。大概是菜鸟的样子，但实在是找不到办法绕过它。提前致谢！

Answer 1

从 Date Time Trail, in particular Parsing and Formatting

开始

类似...

LocalDate ld = LocalDate.now();
System.out.println(ld.format(DateTimeFormatter.ISO_LOCAL_DATE));

打印出来...

2021-11-18

Answer 2

您可以重载 io.print 或将 dvd.getReleaseDate() 转换为字符串。像这样

private void print(LocalDate localDate) {
    System.out.println(localDate.toString());
    // use toString() or format
    System.out.println(format(localDate));
}

private String format(LocalDate localDate) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    return formatter.format(localDate);
}

public void displayDVD(DVD dvd) {
    if (dvd != null) {
        io.print(dvd.getTitle());
        // format
        io.print(format(dvd.getReleaseDate()));
        io.print(dvd.getMpaaRating());
        io.print(dvd.getDirectorsName());
        io.print(dvd.getStudio());
        io.print(dvd.getUserRating());
    }
}

Answer 3

试试这个。

public void displayDVD(DVD dvd) {
    if (dvd != null) {
        io.print(dvd.getTitle());
        io.print(dvd.getReleaseDate().toString());
        io.print(dvd.getMpaaRating());
        io.print(dvd.getDirectorsName());
        io.print(dvd.getStudio());
        io.print(dvd.getUserRating());

如何将 LocalDate 转换为字符串形式以便打印出输入的日期

how do I convert LocalDate to String form so it prints out the date inputed

java

string

model-view-controller

crud

localdate